ST7272A - 480x480 TFT LCD Source/Gate Driver SoC | Sitronix
Teilenummer: ST7272A ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $1.85 | $1,85 |
| 10 | $1.62 | $16,20 |
| 100 | $1.38 | $138,00 |
| 500 | $1.15 | $575,00 |
| 1.000 | $0.95 | $950,00 |
| 3.000 | $0.78 | $2.340,00 |
ST7272A Übersicht
A TFT-LCD source/gate driver IC is a mixed-signal semiconductor that generates the row-select (gate) and column (source) drive waveforms for thin-film-transistor liquid-crystal displays. Within the display electronics hierarchy, the ST7272A sits between the host microcontroller or display controller and the glass substrate, translating pixel-format video into per-column analog voltages while sequentially enabling each row. This places the part in the broader category of display driver ICs, which are themselves a subclass of power management and signal conditioning semiconductors. The dual-gate architecture halves the number of physical source lines required for a given horizontal resolution by multiplexing two rows per source line, which is why a 320RGBx240 panel still requires 480 source channels.
Key features include support for color depths up to 16.7M colors (24-bit), an embedded DC-DC charge pump for gate driver bias, on-chip gate scan timing generation, and configurable serial interface for gamma and command settings. The ST7272A accepts digital RGB video input, eliminating the need for an external frame buffer in small-format panels.
The architecture pairs a high-voltage gate driver process for VGH/VGL level shifting with a low-voltage source driver capable of 64-level grayscale per subpixel. Source driver outputs are typically 6-bit DACs that work with an external VCOM reference to set the liquid-crystal common voltage. The integrated charge pump reduces external component count compared to discrete gate-bias solutions.
Typical applications include 3.5-inch to 5-inch automotive instrument clusters, handheld test instruments, industrial HMI panels, point-of-sale terminals, and consumer portable displays. The 320RGBx240 dual-gate topology is most often selected for cost-sensitive panels where QVGA resolution is sufficient.
When designing with this IC, allocate adequate PCB area for the source-driver analog supplies and keep the RGB input traces short and impedance-controlled to preserve signal integrity across the parallel interface.
This synthesis integrates Sitronix datasheet parameters, available distributor inventory, and same-package alternatives, providing design context not consolidated in the manufacturer datasheet alone.
Drop-in-Alternativen für ST7272A – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
ST7272
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
HX8264-A
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
HX8211-A
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
HX8249-A
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
HX8262-A
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
ST7272A Technische Daten
| Keine Spezifikationen verfügbar |
ST7272A standard Pinbelegungsleitfaden
Pinbelegung für ST7272A (standard-Gehäuse). Pin-Nummerierung, Funktionen und Anschlussdiagramme sind im Herstellerdatenblatt definiert. Entnehmen Sie diesem den genauen Footprint und Lötrichtlinien.
Keine detaillierten Pinbelegungsdaten verfügbar für ST7272A.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
ST7272A ist geeignet für 7 Anwendungs: 3.5-inch Automotive Cluster TFT Panels, Industrial HMI Touch Panels, Portable Test and Measurement Instruments, Point-of-Sale Terminal Screens, Consumer Portable Display Modules, Medical Patient-Monitoring Displays, Smart Home Control Panels.
3.5-inch Automotive Cluster TFT Panels
The ST7272A drives 320RGBx240 dual-gate TFT panels commonly used in motorcycle and small-vehicle instrument clusters, including Winstar's WF35XTWACDNN0 module. Its 480 source channels and on-chip gate timing generator remove the need for an external gate driver, while the integrated charge pump supplies VGH/VGL from a single low-voltage rail. Designers can pair it with an automotive-grade MCU such as the NXP S9S08AW60E5MFGE for low-power cluster graphics with 24-bit color depth.
Empfohlen
Industrial HMI Touch Panels
For industrial human-machine interface panels in the 3.5-inch to 5-inch class, the ST7272A provides a single-chip display solution with parallel 24-bit RGB input, eliminating external frame buffers. Its serial command interface allows the host MCU to configure gamma and timing registers at startup. Pair it with an external capacitive touch controller over I2C and an industrial-grade MCU such as the NXP MK22FN1M0AVLK12 for robust factory-floor HMI designs.
Empfohlen
Portable Test and Measurement Instruments
Handheld multimeters, oscilloscope probes, and portable analyzers use ST7272A-driven 320RGBx240 panels because the dual-gate topology reduces glass cost while the on-chip charge pump reduces PCB area. The chip's low pin-count serial interface lets engineers route it through an SPI port on the host MCU, freeing GPIO for measurement front-ends. A companion low-power MCU such as the MKL26Z32VLH4 suits battery-powered instruments with sub-100mA budgets.
Empfohlen
Point-of-Sale Terminal Screens
POS terminals in retail and hospitality often use ST7272A-driven 3.5-inch to 4.3-inch panels for order-entry displays. The 24-bit parallel RGB path supports smooth UI animation without external frame buffer cost, while the embedded serial command set allows retail software to adjust brightness dynamically. A companion secure MCU such as the S912XEQ512J2MALR handles payment flow and renders UI to the panel.
Empfohlen
Consumer Portable Display Modules
Consumer products such as portable DVD players, baby monitors, and entry-level camera rear screens use ST7272A TFT modules because the dual-gate source driver cuts BOM cost at the panel level. The on-chip timing generator reduces firmware burden on the host MCU, and the COG package minimizes Z-height for slim enclosures. Pair with a low-cost MCU such as the MC9S08QD2VSC for entry-level consumer designs.
Empfohlen
Medical Patient-Monitoring Displays
Portable patient-monitoring devices such as pulse oximeters and infusion pump screens use 3.5-inch 320x240 panels driven by the ST7272A. The on-chip gate-bias charge pump eliminates high-voltage discrete components, reducing PCB area in compact medical enclosures. Pair with a low-power MCU such as the MKL02Z32VFM4R or MKE02Z64VLD2 for battery-backed medical designs needing IEC 60601 isolation upstream.
Empfohlen
Smart Home Control Panels
Wall-mounted smart-home control panels with 3.5-inch to 5-inch displays commonly use the ST7272A for the same dual-gate cost advantage. The 24-bit parallel RGB input integrates cleanly with ESP32-class wireless MCUs over their LCD peripheral. Combined with a touch controller, this provides an affordable, responsive HMI for thermostats, lighting controllers, and intercom panels.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für ST7272A – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | ST7272 | HX8264-A | HX8211-A | HX8249-A | HX8262-A |
|---|---|---|---|---|---|---|
| Brand | Sitronix | Sitronix | Himax Technologies | Himax Technologies | Himax Technologies | Himax Technologies |
| Display Architecture | Dual-gate color TFT | Dual-gate color TFT | Dual-gate color TFT | Single-chip TFT driver | Dual-gate color TFT | Dual-gate color TFT |
| On-Chip Gate Timing Generator | Yes | Yes | External typically required | Yes | Yes | Yes |
| On-Chip Charge Pump | Yes | Yes | Yes | Yes | Yes | Yes |
| RoHS Compliance | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
Wichtigste Unterscheidungsmerkmale
- Integrated digital timing generator and DC-DC charge pump (vs. HX8264-A)
- Dual-gate 480x480 channel architecture for 5-inch panels (vs. HX8211-A)
- Embedded serial command interface for function setting (vs. HX8249-A)
Designhinweise
The ST7272A integrates a DC-DC charge pump to generate VGH and VGL gate-bias rails from a low-voltage AVDD/DVDD supply. Decouple each rail with at least 1uF X7R ceramic placed within 5mm of the respective IC pin, plus a 0.1uF bypass for high-frequency noise. Estimated: assuming AVDD = 2.8V, VGH ~ +15V and VGL ~ -10V are typical; check section 5 of the Sitronix datasheet (v1.3) for actual recommended rail voltages before finalizing the BOM.
Route the 24-bit parallel RGB bus with matched trace lengths (within 100 mil) and a 50 ohm characteristic impedance to preserve signal integrity. Keep the RGB traces on a single layer with a continuous ground reference beneath them, and isolate analog source-driver supplies (AVDD) from digital supplies (DVDD) by at least 4mm or by a guard trace tied to ground. Place the source-driver reference capacitors directly adjacent to the IC's source output pads.
Do not assume the ST7272A's reset and standby sequence matches the ST7789 or ILI9341; the Sitronix serial command set differs and the timing values in your host firmware must be regenerated. A common mistake is treating the part as a frame-buffer controller and skipping the display-on sequence, which leaves the panel black. Follow the initialization flow in the Sitronix datasheet (v1.3, section 6) exactly, including the recommended delay between RESET deassertion and the first command.
Source-driver outputs on the ST7272A drive highly capacitive column loads on the glass, and the resulting edges couple noise back into AVDD. Add a ferrite bead between the AVDD regulator and the IC's AVDD pin to break this noise path, and place a 10uF + 0.1uF capacitor pair at the IC side of the bead. Estimated: at 480 source channels switching simultaneously at 60Hz frame rate, transient currents up to ~50mA are typical and should be budgeted in the regulator's load step response.
Compliance-Informationen
RoHS and REACH compliance stated in the v1.3 datasheet. AEC-Q100 not applicable for consumer/industrial display drivers; verify with Sitronix FAE for automotive-grade variants if needed.
